Matheus Eduardo

This plugin adds a new field (metadata) in the section editing links in order to add social networking links (like <a href="http://twitter.com/" rel="nofollow ugc">twitter</a>, <a href="http://flickr.com/" rel="nofollow ugc">flickr</a>, etc.) to any link.
PT-BR 
Este plugin acrescenta um novo campo (metadados) na seção de edição de links para poder adicionars links de redes sociais (como <a href="http://twitter.com/" rel="nofollow ugc">twitter</a>, <a href="http://flickr.com/" rel="nofollow ugc">flickr</a>, etc) a um link qualquer.

Simply Social Links

This plugin adds a new field (metadata) in the section editing links in order to add social networking links (like twitter, flickr, etc.) to any link.

jimaek

jdorfman

This plugin allows you to easily integrate <a href="http://www.bootstrapcdn.com" rel="nofollow ugc">BootstrapCDN</a> in your WordPress website.
BootstrapCDN is a free and public content delivery network. Users of BootstrapCDN can load CSS, JavaScript and images remotely, from its servers. Bootstrap uses NetDNA’s global content delivery network, which makes websites using its service resilient to unexpected surges in web traffic.
Use this plugin to scan your WordPress website and rewrite all Bootstrap files to CDN hosted links.
Benefits:
<ul>
<li>Faster website</li>
<li>Less requests to your server</li>
<li>Less bandwidth consumed</li>
</ul>
Features:
<ul>
<li>Rewrite all URLs on the fly without changing any source code</li>
<li>Auto-update to latest Bootstrap version</li>
<li>Works with all popular caching plugins</li>
<li>Optional FontAwesome integration</li>
<li>Manually select the version you want to load</li>
</ul>
BootstrapCDN is a free service by <a href="http://www.maxcdn.com" rel="nofollow ugc">MaxCDN</a>

BootstrapCDN – WordPress CDN Plugin

The official WordPress plugin of BootstrapCDN by MaxCDN.

Simply Social Links vs BootstrapCDN – WordPress CDN Plugin